<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>111</title>
    <script type="text/javascript" src="jquery-1.10.2.js"></script>
    <script type="text/javascript">
        function test(){
            $("#div").toggle();
        }
    </script>
</head>
<body>
    <input type="checkbox" value="测试" checked="checked"  id="checkbox" onchange="test()"/>测试
    <div id="div" style="display: none">
        <select>
            <option>1</option>
            <option>2</option>
            <option>3</option>
            <option>4</option>
            <option>5</option>
        </select>
    </div>
</body>
</html>